Post by Admin on Mar 15, 2014 19:14:14 GMT
•Transforms structured objects into a byte stream.
For transmission over the network hadoop uses RPC
For persistent storage on disks.
•Hadoop uses its own serialization format, writable
•Comparison of types is crucial (shuffle and sort phase).hadoop provides a custom RAW comparator, which avoids de serialization.
•Custom, writable for having full control on the binary representation of the data.
•Also external frame works are allowed. Enter AVRO
For transmission over the network hadoop uses RPC
For persistent storage on disks.
•Hadoop uses its own serialization format, writable
•Comparison of types is crucial (shuffle and sort phase).hadoop provides a custom RAW comparator, which avoids de serialization.
•Custom, writable for having full control on the binary representation of the data.
•Also external frame works are allowed. Enter AVRO